GB215221A - Improvements in or relating to dual ignition apparatus for internal combustion engines - Google Patents

Abstract

215,221. Courtier, J. July 2, 1923. External spark gaps of adjustable size are inserted in both sections of a dual ignition circuit, and are subjected to a common control by which the gaps in both sides of the circuit may be closed, or those in one side only may be kept closed while in the other gaps of varying size are formed. Spark gaps A', A<2> may be formed between fixed terminals 1, 1<1> and terminals 8, 8<1> mounted on stems which may be moved by rocking the member 18 by means of a lever 28. The sources of current are connected to the pairs of terminals 5, 17 and 5<1>, 17<1>. In a modification a disc rotatable by means of the handle 26' carries semi-circular conducting strips separated from each other by insulation 36, 36<1>, and each divided into segments 30, 31 and contacts 34, 35 with intervening gaps 32, 33. In the neutral position, four brushes 37, 38, 39, 40 are in engagement with the continuous segments 30, 31. By moving the lever 26<1> to the right or left, one or more of the gaps 34 or the gaps 35 are thrown into circuit, one ignition circuit, however, remaining closed when gaps are inserted in the other. In a further modification, the gapped portion of each semi-circular segment may be of less radius than the continuous portion.